6-page fold-out document. Not so much a 'manual' (note that 'manual' is mis-spelled on cover) as it is a reference for use with Stern's service school for early electronic pinball games. Not a lot of material in this item, but a nice addition to your game's paperwork collection. This document features TTL logic truth tables and other info on select ICs use in these games, as well as SCR's, flip-flop ICs, and a block diagram for Stern electronic pinball games.